But these seven minutes will not be easy—you should experience "steady discomfort" for the duration of your workout, AKA it will be seven minutes of really. hard. work. Get ready to sweat!

What exactly isinterval training? It's super intense activity, combined with brief periods of rest—so, 30 seconds of squats or lunges, with a ten-second break in between reps. Allowing your body to rest and then kicking it back into gear forces you to work much harder than if your heart rate stays at a steady pace.

The new study found that for optimum results, you'll do 12 exercises, and all you'll need is a chair and a wall—you use your body weight in place of dumbbells. (This means you can even do the workout in your room or dorm room, if you can't make the trek to the gym!)

"The scientific seven-minute workout is good if you'er short on time and need a high intensity full body training session," said Jay McLeod, who trains Bella Thorne. "Combine it with cardio, a resistance training program, and a healthy diet!"

Check out the full workout here. The bad news? It will be seven minutes of hell. The good news? It will be over in just seven minutes!